Finding the Fourth Proportional to 3,936.75, 5,432.72 and 2,168.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.75 : 5,432.72 = 2,168.35 : x
2. Step 2: Convert to fraction form
   3,936.75/5,432.72 = 2,168.35/x
3. Step 3: Cross multiply
   3,936.75x = 5,432.72 × 2,168.35
4. Step 4: Simplify right side
   3,936.75x = 11,780,038.41
5. Step 5: Solve for x
   x = 11,780,038.41/3,936.75
6. Step 6: Final answer
   x = 2,992.33